JP2013008763A - Light focus solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light focus solar cell having a power generation element ensuring a stable radiation performance without depending on the time shift; i.e. variation of wind and/or position of the sun.SOLUTION: The light focus solar cell has a first ventilation passage 3 enclosing a piece of heat exchange means 4 for cooling a power generation element 1 and a second ventilation passage 7 connected to the first ventilation passage via a flexible pipe 8. The second ventilation passage includes a light absorbing member for radiation member 5 at a light receiving plane side. The light focus solar cell is configured so that the chimney effect of the second ventilation passage ensures the heat dissipation performance of the power generation element even when the inclination angle of the power generation element varies. Even when the inclination angle of the power generation element varies in order to track the sun, the heat dissipation performance is surely maintained and the heat dissipation increases the efficiency and service life of the power generation element.

Description

  The present invention relates to a concentrating solar cell.

  As awareness of environmental issues increases, interest in cleaner energy supply systems and business initiatives associated with nuclear power accidents are spreading worldwide. In particular, expectations for solar cells, which are representative of natural energy, are increasing.

  However, the performance of the power generation element that converts sunlight into electric energy is in a saturated state, and a leap toward more efficient energy conversion is expected. As a solution for this, a concentrating solar cell has been developed. This is a method of improving the power generation efficiency of a conventional power generation element by condensing sunlight with a lens and focusing on the power generation element. The reduction of material cost due to the reduction of the area of the power generation element by the light collection is also a great merit.

  In a concentrating solar cell, sunlight is condensed by an optical element such as a lens to increase the amount of incident light on the power generation element. Therefore, there was a problem that the temperature of the power generation element suddenly increased. The heat causes a problem that the power generation element deteriorates. In order to solve this problem, a cooling method for the power generation element has been proposed. As a cooling method, there are a water cooling method and an air cooling method. As the water cooling method, a method in which a water-cooled tube is installed in the power generation element, a method in which a liquid metal having high heat transfer performance is provided in contact with the power generation element, a method of directly cooling the power generation element with a refrigerant, and the like have been proposed. In the air cooling method, there is a method in which air cooling fins are provided on the back surface of the power generation element and the air cooling fins are cooled by a blower fan.

  Comparing the water cooling method and the air cooling method, the water cooling method uses a medium having higher heat transfer performance than air, and therefore the cooling performance is very high. However, a pump for circulating a medium such as water is required, or the medium itself such as liquid metal is expensive, so that the manufacturing cost tends to be very high. On the other hand, in the case of using an air cooling system, when a blower fan is used, the cost increases. Therefore, there is a configuration in which a heat exchanger is installed in the power generation element and air contacts the heat exchanger.

  As an example of heat dissipation of a power generation element of a conventional concentrating solar cell, a solar cell having an air-cooling type cooling mechanism has been devised (for example, see Patent Document 1).

  FIG. 8A is a schematic diagram of an example of a configuration of a conventional concentrating solar cell. FIG. 8B is a schematic perspective view of an example of the configuration of a conventional concentrating solar cell. A gantry 51 having a driving device for tracking the sun for condensing light to the power generating element, a power generating element 52, a refractive optical system 53 for condensing light, a heat exchanger 54 for cooling the power generating element 52, heat An opening 55 for sending air to the exchanger 54, an air passage 56, and an opening 57 for taking out air from the heat exchanger 54 are provided. The parallel light from the sun passes through the refractive optical system 53 and is condensed on the power generation element 52, and the power generation element 52 that has absorbed the light creates electric power and heat. The generated heat is transmitted from the power generation element 52 to the heat exchanger 54, exchanges heat with the air flowing in from the opening 55, and the warmed air flows out from the opening 57.

  FIG. 8C is a schematic cross-sectional view of a configuration example of a conventional concentrating solar cell. The wind 58 blown to the light receiving surface side of the power generation element 52 of the concentrating solar cell moves upward along the surface of the power generation element 52 and heat exchange on the non-light receiving surface side of the power generation element 52 from the opening 55 at the upper edge. Sent to the device 54. The heat-exchanged air passes through the ventilation path 56 and is discharged from the opening 57 at the lower edge.

  In this configuration, the solar power can always be cooled by exchanging heat of the power generation element by ventilation.

  As an example related to heat radiation of a power generation element of a conventional solar cell, a solar cell including an air-cooling type cooling mechanism using a chimney effect has been devised (see, for example, Patent Document 2).

  9A and 9B, FIG. 10A, FIG. 10B, and FIG. 10C show a configuration that radiates heat by a chimney effect using buoyancy due to a temperature difference. A cross-sectional view is shown in FIG. 9A. The substrate 61 to which the power generation element 64 is attached, the plate-like component 62 attached in parallel to the substrate, the rising cylinder 63 having a chimney shape and an opening at the top and bottom, and the light absorbing material 65, are interposed between the substrate and the plate-like member 62. The sandwiched space communicates with the inside of the rising cylinder 63. FIG. 9B shows a perspective view in which the substrate 61 and the plate-like member 62 are separated. The air flow for heat dissipation is driven by the pressure difference caused by the heat rising flow generated inside the rising cylinder 63, and the external air sucked in the peripheral portion of the space sandwiched between the substrate 61 and the plate-like component 62. After the power generation element 64 is cooled by the flow, it enters the inside of the rising cylinder 63, becomes a heat rising flow, rises inside the rising cylinder 63, and is discharged from the opened upper end of the rising cylinder 63. The light-absorbing member 65 is disposed in the central portion of the substrate 61 without attaching the power generation element 64. The light absorbing member 65 absorbs sunlight and transmits the heat to the air, so that the heat rising flow of the rising cylinder 63 is strengthened.

  FIG. 10A shows a case where the light receiving surface is not horizontal but is inclined. In this case, if the ascending cylinder 63 is inclined, the heat rising flow is hindered. Therefore, the mounting angle is set so that the ascending cylinder 63 is always in the vertical direction. In FIG. 10A, in order to prevent an imbalance in air flow that may occur due to the inclination, side plates 65 are attached to the side surfaces of the substrate 61 and the plate-like member 62 so that the lower side of the internal space and the rising cylinder 63 Only the upper end is opened, and a plurality of rising cylinders 63 are provided at the end on the high place side. 10B is a cross-sectional view of FIG. 10A.

  In FIG. 10C, the rising cylinder 63 has a cross-sectional shape that is not circular but has an elongated cross-section.

JP 2002-170974 A JP 2011-35355 A

  However, there is a problem with the heat radiation component of the concentrating solar cell having the above-described configuration.

  In the method of Patent Document 1, the wind 58 blown toward the light receiving surface side where the refractive optical system 53 is located is taken in from the opening 55 at the upper edge, sent to the heat exchanger 54 of the power generation element 52, and after the heat exchange, the ventilation path 56. And is discharged from the opening 57 at the lower edge. That is, it is mainly configured to use air on the light receiving surface side. However, the direction in which the wind blows is not constant. In a no-air condition, the air is discharged from the opening 55 by a buoyancy due to a decrease in the density of air heated by the heat exchanger 54 in the ventilation path 56. On the other hand, the air flow is reversed at the opening 55 during the time period when the wind blowing toward the light receiving surface is generated as described above. The flow of air for heat radiation that is greatly affected by a non-constant wind is a drawback because it directly increases or decreases the heat radiation performance. In addition, since the angle of the ventilation path 56 is changed by the gantry 51 provided with a driving device for tracking the sun for condensing on the power generation element, the effect of the buoyancy, which is the basic performance, is changed each time, while the opening 55 Since the direction with respect to the wind also changes slightly, there is a problem that the heat radiation performance changes depending on the position of the sun, that is, the time zone.

  In the method of Patent Document 2, the chimney effect depends on the performance of the rising cylinder 63. Since it is optimal that the ascending cylinder 63 is always in the vertical direction, the angle of the ascending cylinder 63 is determined at the design time according to the inclination of the power generating element 64 and the like at the time of installation, and is not variable. As a result, there is a major drawback that tracking to the sun is impossible. Even if the solar light is not tracked, a design change is required according to the latitude of the area where the solar cell is used. Further, the heated air that is the power source of the chimney effect depends only on the heat absorption to the light absorbing member 65 and changes depending on the position of the sun, that is, the time zone or the season, so that a constant chimney effect is always obtained. Therefore, the cost related to the installation of the light absorbing member 65 is always necessary. The point that the sun cannot be tracked and the cost of changing to the optimum design for each latitude of the area to be used may be a disadvantage to popularization.

  An object of the present invention is to provide a concentrating solar cell that solves the conventional problems.

  In order to solve the above-described conventional problems, the solar cell of the present invention includes a first air passage surrounding the heat exchange means for cooling the power generation element, and a second air passage connected to the first air passage and the flexible pipe. And a light absorbing member for heat dissipation component is provided on the light receiving surface side in the second air passage.

  According to the solar cell of the present invention, good heat radiation is always possible without depending on the direction change of the power generation element during solar tracking. As a result, it is possible to provide a highly efficient and long-life concentrating solar cell with the same configuration regardless of the installed longitude and time zone.

The figure which showed the concentrating solar cell in Embodiment 1 of this invention Diagram explaining the basic configuration and characteristics of the present invention Diagram explaining the basic configuration and characteristics of the present invention Illustration explaining conventional heat dissipation parts The figure which shows the concentrating solar cell shown in Embodiment 1 Illustration explaining conventional heat dissipation parts The figure explaining the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 The figure which shows the concentrating solar cell shown in Embodiment 1 Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component Diagram showing the configuration of a concentrating solar cell equipped with a conventional heat dissipation component

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration of concentrating solar cell 100 in the first embodiment.

  A concentrating solar cell system 100 shown in FIG. 1 is disposed on a plurality of power generation elements 1, a condensing lens group 2 disposed on a light receiving surface of the plurality of power generation elements 1, and a rear surface of the plurality of power generation elements 1. The first air passage 3, the heat radiation fins 4 disposed inside the first air passage 3, the light absorbing member 5 for the heat radiating component, and the heat radiation disposed on the rear surface of the light absorbing member 5 for the heat radiating component. The heat dissipating fin for component 6, the second air passage 7 disposed on the rear surface of the heat dissipating fin 6 for heat dissipating component, the flexible pipe 8, and the tracking mechanism 9 are provided.

In the present specification, a surface irradiated with sunlight is referred to as a “light receiving surface”, and a surface that faces the light receiving surface in each member is referred to as a “rear surface”.
A configuration obtained by removing the tracking mechanism 9 from the concentrating solar cell 100 is also referred to as a solar cell unit 101.

  The power generating element 1 receives sunlight and generates heat. The power generating element 1 has a film shape.

  The condenser lens group 2 collects sunlight. It is composed of a plurality of lenses 21 arranged on the light receiving surface of the power generation element 1.

  The first air passage 3 is disposed on the rear surface of the plurality of power generating elements 1. The first air passage 3 is disposed on the light receiving surface side, and includes a first end portion 41 that is an opening, an air passage 42 that is located on the rear surface of the plurality of power generating elements, and a second end portion 43. Have.

  The flexible pipe 8 is connected to the second end 43 of the first air passage 3.

  The second air passage 7 has a first end portion 61, an air passage 62, and a second end portion 63 which is disposed on the light receiving surface side and is an opening.

  The flexible pipe 8 is connected to the first end 61 of the second air passage 7.

  The ventilation path 62 is disposed on the rear surface of the heat dissipating fin 6 for heat dissipating parts.

  The opening from the first air passage 3 extends through the flexible pipe 8 to the opening of the second air passage.

  The tracking mechanism 9 adjusts the angle of the solar cell unit 101 so that sunlight enters the light receiving surface of the power generation element 1. Preferably, the angle of the solar cell unit 101 is adjusted so that sunlight enters perpendicularly to the condenser lens group 2.

  According to such a configuration, even if the inclination angle of the power generation element 1 changes, the heat dissipation effect of the power generation element 1 is kept constant by maintaining the chimney effect in the sum of the first ventilation path 3 and the second ventilation path 7 constant. It is configured so that it can be maintained. As a result, even if the inclination angle of the power generation element 1 changes due to solar light tracking, the second air passage 7 is fixed, so that the heat dissipation effect can always be maintained, and the efficiency and life of the power generation element 1 can be increased by heat dissipation. Since the improvement is realized, it is useful as a heat dissipating part of the power generation element 1 of the concentrating battery.

  Although the chimney effect will be described in detail later, the buoyancy is not generated because the first air passage 3 is in the horizontal direction in the time zone where the sun is directly above, but the second owing to the buoyancy in the inclined second air passage 7 A large air convection called a chimney effect can be generated in the air passage 7. As a result, since the first air passage 3 is connected by the second air passage 7 and the flexible pipe 8, air convection necessary for heat dissipation also occurs in the first air passage 3, and the heat generating element 1 can dissipate heat. It becomes. Further, in the time zone in which the sun is positioned in the horizontal direction, the chimney effect is generated in both the first air passage 3 and the second air passage 7. And in the time slot | zone etc. where sunlight is located in the diagonal direction, the buoyancy according to an inclination angle generate | occur | produces in both the 1st ventilation path 3 and the 2nd ventilation path 7. FIG. That is, regardless of the position of the sun, the heat radiation of the power generating element 1 of the concentrating solar cell of the present invention is guaranteed by the chimney effect in the second air passage 7.

  The basic principle of the heat dissipating component of the power generating element in the first embodiment will be described. 2A and 2B illustrate the size and power generation efficiency of the power generation element 1 of the concentrating solar cell, and FIGS. 3A and 3B describe a comparison of the heat dissipation effect due to the chimney effect with the conventional heat dissipation component.

  FIG. 2A shows the prediction of the condensing magnification, the temperature of the power generation element, and the temperature reduction effect due to the division for the concentrating solar cell. For example, compared with the case where it condenses to a 10 mm power generation element, the temperature distribution when dividing | segmenting a power generation element into 100-500 micrometers and condensing is shown typically. Since the heat radiation area for each power generation element is expected to increase by dividing the power generation element, each temperature decreases.

  FIG. 2B shows general numerical values of conversion efficiency (power generation efficiency) with respect to the temperature of the power generation element. As described above, a temperature decrease can be expected by dividing, but as a result, the power generation efficiency of the power generation element is increased, and thus there is a great merit. Considering that the amount of material used as the power generation element can be reduced, it can be seen that the cost reduction effect is great. It can be said that reducing the temperature of the power generation element is very important, including in factories with long service lives. Here, when the power generation element size is 500 μm and 100 μm, the condensing magnification is 1,000 times and 5,000 times, respectively. Even if the element size is reduced for 5,000 times condensing, on the contrary, the energy density is increased, and thus it cannot always be said that the temperature of the element is lowered.

  FIG. 3A shows a conventional heat dissipation state. In particular, since there is no mechanism for heat dissipation, it depends on natural convection caused by buoyancy due to the temperature rise of the surrounding air, so the heat dissipation effect is the smallest. In addition, since a flow upward in the vertical direction occurs, there is a significant decrease in the heat dissipation effect in the upper part (in the rear stream), so attention is also required for dividing the power generation element. FIG. 3B shows a case where an air passage is provided around the power generation element. Here, the ventilation path is expressed as a cylinder (chimney). That is, it is the structure which anticipates the chimney effect for remarkable heat dissipation by providing the cylindrical ventilation path which has an opening part only in the lowest step and the highest step of a perpendicular direction. As can be seen from the comparison of flow distributions in FIG. As a supplement, FIGS. 4A and 4B schematically show flows corresponding to FIGS. 3A and 3B, respectively.

  In addition, it is known that a large heat dissipation effect utilizing this high-speed updraft can be obtained by providing heat dissipation fins along the flow in the air passage as in the embodiments described later.

Example 1
FIG. 5 shows Example 1 relating to the power generation element according to Embodiment 1 of the present invention. This is a layout diagram of the power generation element 1 capable of condensing 1,000 times. The shape of the power generation element 1 is 0.5 mm × 0.5 mm and the thickness is 0.1 mm. Since the power generation elements 1 are arranged at intervals of 16 mm, the size of each lens of the condenser lens group 2 is 16 mm × 16 mm. In this example, the thickness of the condenser lens group 2 is 16 mm. Since the light is condensed 1,000 times, the energy applied to each power generating element 1 is 1,000 kW / m 2. In this example, the power generating elements 1 are arranged in seven vertical and seven horizontal directions, and the solar cell has a cell size of 192 mm × 192 mm.

  6A, 6B, and 6C show the operation of solar cell 100 shown in Embodiment 1. FIG.

  FIG. 6A shows the positional relationship of the solar cell 100 in a time zone in which the sun is positioned in the horizontal direction. In FIG. 6A, the chimney effect occurs in both the first air passage 3 and the second air passage 7. Also in this case, the point which the 1st ventilation path 3 and the 2nd ventilation path 7 connect is an important structure. In other words, the heat that becomes the buoyancy activation source is generated in the first air passage 3, but the second air passage 7 that is in communication generates air that has been heated to an equal or higher temperature, so As a sum of the buoyancy of both the one air passage 3 and the second air passage 7, a large chimney effect can be generated.

  Next, FIG. 6B shows a positional relationship of the solar cell 100 in a time zone in which sunlight is located in an oblique direction. Even in such a situation, buoyancy corresponding to the inclination angle is generated in both the first air passage 3 and the second air passage 7. In particular, as shown in FIG. 1A, the second air passage 7 is preferably installed in an inclined manner so that it can be lit by sunlight from all directions. As a result, since the total chimney effect due to the total buoyancy of the first air passage 3 and the second air passage 7 is obtained, the heat dissipation effect due to the chimney effect is the highest as compared with the horizontal case or the vertical case described above. It is expected to grow. Although there are some differences on a case-by-case basis due to the size of the chimney effect in the first air passage 3 and the second air passage 7, a considerably large chimney effect can be obtained from the case where the sun is horizontal to the diagonal direction. Become. On the contrary, when the sun is vertically above, it depends only on the chimney effect due to the buoyancy of about 70% (sin (45 degrees)) of the second air passage 7. Therefore, the design should be optimized based on the second air passage 7.

  Furthermore, FIG. 6C shows a positional relationship of the solar cell 100 in a time zone in which the sun is located directly above. In this case, buoyancy is not generated because the first air passage 3 is in the horizontal direction. At this time, in the second air passage 7, there is the heat absorbing component light absorbing member 5 that can absorb the heat energy of the solar light for efficiency, so the air in the second air passage 7 passes through the heat dissipating fins 6 for heat dissipating components. It is possible to easily raise the temperature. In other words, by raising the temperature of the air in the second air passage 7, buoyancy generated due to a temperature difference with the air outside the second air passage 7 works, so that a large air convection called a chimney effect can be generated. is there. As a result, since the first air passage 3 is connected by the second air passage 7 and the flexible pipe 8, air convection necessary for heat dissipation also occurs in the first air passage 3, and the heat generating element 1 can dissipate heat. It becomes.

  In addition, about the radiation fin, although the thing made from aluminum of about 1 mm thickness is provided in the flow path in the 1st ventilation path 3 at the both ends of each electric power generation element, by increasing the number, a bigger heat dissipation effect is also obtained. Be expected.

  The thickness of the first air passage 3 and the second air passage 7 is also an important parameter, but here it is about 25 mm for convenience of mounting. That is, the internal width of the first air passage 3 and the second air passage 7 is 25 mm, but if it is too small, it becomes fluid resistance, and conversely if it is too wide, the weight of the entire concentrating solar cell increases. In particular, an increase in the weight of the first air passage 3 places a burden on the mechanism for tracking sunlight.

  Although not shown in Embodiment 1 of the present invention, it is possible to provide a lens cooling air passage on the light receiving surface side of the power generation element 1 and connect it to the second air passage 7 by the flexible pipe 8. Is also possible. In addition to the first air passage 3, it can be expected that the chimney increases. In that case, in order to improve the durability of the light receiving surface of the power generation element 1 or to prevent contamination, it is preferable to install a lens cooling air passage made of a transparent material. At this time, it is also effective to use an ultraviolet (UV) absorbing material for the lens cooling air passage. In many cases, the condenser lens group 2 is made of resin (made of polycarbonate). In this case, there is a property that light of 400 nm or less is not transmitted, and damage due to wavelengths near 300 nm is particularly a concern. Therefore, absorbing the heat as the heat in the lens cooling air passage helps the chimney effect of the lens cooling air passage and improves the durability of the condenser lens group 2. In addition, the influence on the performance of the 1st ventilation path 3 does not change, and sufficient heat dissipation characteristic is maintained.

  The light-absorbing component light absorbing member 5 is a member that absorbs sunlight and transmits the heat to the inflowed air to increase the heat rising flow in the second air passage 7. Therefore, the simplest structure of the light absorbing member 5 for heat dissipation component is a simple metal plate, but the surface is preferably painted black to increase the light absorption rate, and the material is a heat conductive material such as aluminum. Is desirable.

  Moreover, as shown to FIG. 7A, FIG. 7B, and FIG. 7C, the 2nd ventilation path 7 has a quarter circular arc shape, and arrange | positions so that it may become convex in the direction of the sun, Regardless of the position, the heat-absorbing component light absorbing member 5 can always receive heat from sunlight vertically, so that the heat receiving efficiency is improved as compared with FIG. However, since the total length of the second air passage 7 tends to be long, it may not be preferable depending on the installation location. Moreover, even if it is not convex, the same performance can be obtained even when it is concave. In this case, since the opening of the outlet faces vertically upward, it may not be preferable in response to falling objects such as rain. Here, when the height in the extending direction of FIG. 6 and the second air passage 7 is equal to the height in the vertical direction corresponding to the radius of the quarter arc shape in FIG. 7, the chimney effect is Since the size of buoyancy is the same, when the effect of FIG. 7 is expected with respect to FIG. 6, it is necessary to increase the radius of the quarter arc shape.

  Furthermore, if the light-absorbing component light absorbing member 5 as a whole is closely attached to or integrated with the heat-dissipating component heat-dissipating fin 6, air can be heated more effectively and the chimney effect can be increased.

  The heat dissipating component of the power generating element according to the present invention has a first air passage that surrounds the heat exchanging means to cool the power generating element, a second air passage that is connected to the first air passage and the flexible pipe, A light absorption member for heat dissipation component is provided on the light receiving surface side in the two air passages, and the heat dissipation effect of the power generation element can be maintained from the chimney effect of the second air passage even if the inclination angle of the power generation element changes. ing. As a result, even if the inclination angle of the power generation element changes due to solar tracking, the heat dissipation effect can always be maintained, and the efficiency of the power generation element and the improvement of the life can be achieved by heat dissipation. It is useful as a heat dissipation component for power generation elements.

DESCRIPTION OF SYMBOLS 1, 52, 64 Power generation element 2 Condensing lens group 3 1st ventilation path 4 Heat radiation fin 5 Light absorption member for heat radiation parts 6 Heat radiation fin for heat radiation parts 7 Second ventilation path 8 Flexible piping

Claims (8)

A condensing lens that collects sunlight;
A power generating element having a light receiving surface for receiving the condensed light;
A first air passage disposed in contact with the power generating element and a surface different from the light receiving surface; a first end portion; and a first air passage disposed on the light receiving surface side and having a second end portion that is an opening;
A light-absorbing member for a heat-dissipating component having a light-receiving surface that receives the sunlight; and
A heat dissipating fin for heat dissipating component disposed on the rear surface of the light absorbing member for heat dissipating component;
A second air passage disposed on the rear surface of the heat dissipating component heat dissipating fin, having a third end, and a fourth end disposed on the light receiving surface side and having a fourth end that is an opening;
Flexible piping connecting the first end and the second end;
Penetrating from the opening of the first branch passage to the opening of the second ventilation passage,
Concentrating solar cell. A power generation element;
In the concentrating solar cell having at least a cooling means for cooling the power generation element,
The cooling means comprises a cooling mechanism of an air cooling system provided on the non-light-receiving surface side of the power generation element,
The cooling mechanism has a heat exchange means and a first air passage surrounding the heat exchange means,
Having a second air passage connected by flexible piping with the first air passage;
The concentrating solar cell, wherein the second air passage is provided with a light absorbing member for heat dissipation component on the light receiving surface side.   The concentrating solar cell according to claim 2, wherein the power generating element includes a mechanism for tilting the light receiving surface by tracking the sun.   The concentrating solar cell according to claim 2, wherein the power generating element includes a condensing optical system on a light receiving surface side thereof.   The concentrating solar cell according to any one of claims 2 to 4, wherein the heat exchanging means includes a radiating fin as an enlarged heat transfer surface.   The concentrating solar cell according to any one of claims 2 to 5, wherein a radiation fin for heat radiation component is connected to the light absorbing member for heat radiation component.   The concentrating solar cell according to any one of claims 2 to 6, wherein the second air passage has a length equivalent to that of the first air passage. The second air passage has a quarter arc shape and is arranged so as to be convex or concave in the sun direction. Concentrated solar cell.

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